Remove encoding parameter from createMultiPartFormData() and createFormData()

Source/core/xml/XMLHttpRequest.cpp

Index: Source/core/xml/XMLHttpRequest.cpp
diff --git a/Source/core/xml/XMLHttpRequest.cpp b/Source/core/xml/XMLHttpRequest.cpp
index 70378bb5f9a0d3bb76b8b9e33b11cb657ee1e385..3befd8e2073a228de6f5b8b423db4ba35ff31784 100644
--- a/Source/core/xml/XMLHttpRequest.cpp
+++ b/Source/core/xml/XMLHttpRequest.cpp
@@ -752,7 +752,7 @@ void XMLHttpRequest::send(DOMFormData* body, ExceptionState& exceptionState)
     RefPtr<FormData> httpBody;
 
     if (areMethodAndURLValidForSend()) {
-        httpBody = body->createMultiPartFormData(body->encoding());
+        httpBody = body->createMultiPartFormData();
 
         if (getRequestHeader("Content-Type").isEmpty()) {
             AtomicString contentType = AtomicString("multipart/form-data; boundary=", AtomicString::ConstructFromLiteral) + httpBody->boundary().data();